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