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