For any finite group G, the equivariant Gromov-Witten invariants of
[Cr/G] can be viewed as a certain twisted Gromov-Witten invariants
of the classifying stack BG. In this paper, we use Tseng's
orbifold quantum Riemann-Roch theorem to express the equivariant Gromov-Witten
invariants of [Cr/G] as a sum over Feynman graphs, where the weight
of each graph is expressed in terms of descendant integrals over moduli spaces
of stable curves and representations of G.Comment: This paper is a non-abelian generalization of arXiv:1310.481