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