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