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