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