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)(17,18,21,25)(19,26,22,23)(20,24,28,32)(27,31,29,30)(2,5)(6,8)(9,11)(10,13)(12,16)(14,15)(19,22)(20,27)(23,26)(24,31)(28,29)(30,32) involution — undirected(10,14)(11,16)(17,19,21,22)(18,23,25,26)(20,27,28,29)(24,30,32,31)(1,3,4,7)(2,6,5,8)(10,14)(13,15)(17,20)(18,24)(19,27)(21,28)(22,29)(23,30)(25,32)(26,31)(2,5)(6,8)(10,14)(13,15) 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.