One vertex per element, one color per generator, with an edge from x to x·s.
(2,5)(6,8)(9,10)(11,13)(12,14)(15,16)(17,18,23,27)(19,24,21,25)(20,29,32,28)(22,31,30,26)(1,2)(3,6)(4,5)(7,8)(9,10)(11,15)(12,14)(13,16)(17,19,23,21)(18,24,27,25)(20,26,32,31)(22,28,30,29)(1,3,4,7)(2,6,5,8)(9,11)(10,13)(12,16)(14,15)(17,20,30,25,23,32,22,24)(18,21,31,28,27,19,26,29)(2,5)(6,8)(11,16)(13,15)(17,21,23,19)(18,25,27,24)(20,31,32,26)(22,29,30,28)(10,14)(13,15)(19,21)(20,32)(24,25)(28,29) 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.