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)(17,18,21,23)(19,26,29,32)(20,24,31,30)(22,28,27,25)(2,6)(7,8)(9,11)(10,13)(12,15)(14,16)(18,23)(20,31)(25,28)(26,32) involution — undirected(1,3,5,4)(2,7,6,8)(10,14)(11,15)(17,19,27,24,21,29,22,30)(18,20,28,32,23,31,25,26)(1,4,5,3)(2,8,6,7)(11,15)(13,16)(17,20,21,31)(18,24,23,30)(19,28,29,25)(22,26,27,32)(19,29)(20,31)(24,30)(26,32) 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.