We calculate the electromagnetic multipole moments of the Σ-type strange hidden-charm pentaquarks \( {P}_{\psi s}^{\Sigma} \) — which form an isospin triplet with three distinct charge states (Σ+, Σ0, Σ−) offering independently measurable electromagnetic properties — using QCD light-cone sum rules, employing six interpolating currents for the spin- \( \frac{1}{2} \) channel and seven for the spin- \( \frac{3}{2} \) channel, each built from diquark-diquark-antiquark operators with scalar or axial-vector diquark content. We compute the magnetic dipole moment μ for all channels and, for spin- \( \frac{3}{2} \) , the electric quadrupole \( \mathcal{Q} \) and magnetic octupole \( \mathcal{O} \) moments, the latter two for the first time for this system, and provide the first systematic quark-flavor decomposition of all three multipole moments for \( {P}_{\psi s}^{\Sigma} \) . The results show a systematic dependence on the diquark spin. Scalar diquark currents yield charm-sector-dominated, flavor-insensitive moments (μ ∈ [−1.92, −1.21] μN for spin- \( \frac{1}{2} \) and |μ| ≲ 1.2 μN for spin- \( \frac{3}{2} \) ), consistent with the heavy-quark spin symmetry limit. Axial-vector diquark currents produce larger, flavor-sensitive moments with sign reversals governed by the eu/ed = –2 charge ratio. For \( \mathcal{Q} \) , scalar-diquark currents give oblate deformations (Q0 ≈ –2.0 × 10−2 fm2) dominated by the charm sector, while two-axial-vector-diquark currents predict prolate values up to Q0 = +8.0 × 10−2 fm2, with a sign reversal for \( \left[ su\right]\left[ uc\right]\overline{c} \) in two currents. Currents with scalar antiquark coupling yield a topology-independent octupole value \( \mathcal{O} \) ≈ –0.25 × 10−3 fm3, which may serve as a lattice QCD benchmark. Comparison with constituent quark model predictions identifies four qualitative discriminants: |μ| ≳ 3 μN in the spin- \( \frac{1}{2} \) sector; the sign of μ for the \( \left[ su\right]\left[ uc\right]\overline{c} \) state in the spin- \( \frac{3}{2} \) sector; a non-zero \( \mathcal{Q} \) , which vanishes in the S-wave molecular approximation; and the sign correlation between \( \mathcal{Q} \) and \( \mathcal{O} \) , which probes the 1/mq mass weighting of the magnetization distribution.
