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