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