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