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