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