One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(9,10)(11,15)(12,14)(13,16)(17,18,22,21)(19,26,29,24)(20,25,31,23)(27,32,28,30)(2,5)(6,8)(9,11)(10,13)(12,16)(14,15)(17,19)(18,24)(20,27)(21,26)(22,29)(23,32)(25,30)(28,31) involution — undirected(1,3,4,7)(2,6,5,8)(10,14)(11,16)(17,20)(18,25)(19,27)(21,23)(22,31)(24,30)(26,32)(28,29)(10,14)(13,15)(17,21,22,18)(19,28,29,27)(20,25,31,23)(24,32,26,30)(2,5)(6,8)(10,14)(13,15)(18,21)(20,31)(24,26)(27,28) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.