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