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