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