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