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