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