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