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