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