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