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