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