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