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