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