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