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