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