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