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