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