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