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