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