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