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