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