One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,5)(6,8)(9,10,13,12)(11,15,16,14)(17,18,22,25)(19,21,27,23)(20,28,31,24)(26,32,29,30)(9,11,13,16)(10,14,12,15)(17,18)(19,21)(20,24)(22,25)(23,27)(26,30)(28,31)(29,32)(2,5)(6,7)(9,10,13,12)(11,14,16,15)(17,19,22,27)(18,23,25,21)(20,29,31,26)(24,30,28,32)(1,2)(3,6)(4,5)(7,8)(17,19)(18,21)(20,26)(22,27)(23,25)(24,30)(28,32)(29,31) involution — undirected(1,3)(2,6)(4,8)(5,7)(9,12,13,10)(11,15,16,14)(17,20,22,31)(18,24,25,28)(19,26,27,29)(21,30,23,32)(17,21)(18,19)(20,30)(22,23)(24,26)(25,27)(28,29)(31,32) 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.