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