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)(19,23,26,27)(20,24,29,30)(25,31,28,32)(2,5)(6,8)(9,11,12,16)(10,13,14,15)(18,22)(20,24)(23,27)(25,31)(28,32)(29,30)(1,3,4,7)(2,6,5,8)(10,14)(11,16)(17,19,21,26)(18,23,22,27)(20,28,29,25)(24,32,30,31)(10,14)(13,15)(17,20,21,29)(18,24,22,30)(19,25,26,28)(23,31,27,32)(2,5)(6,8)(10,14)(13,15)(19,26)(23,27)(25,28)(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.