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