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