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)(17,18,23,28,22,24,20,26)(19,29,30,32,27,25,31,21)(1,2,4,5)(3,7,8,6)(9,11,12,15)(10,13,14,16)(18,24)(21,32)(25,29)(26,28)(10,14)(13,16)(17,19)(18,25)(20,31)(21,28)(22,27)(23,30)(24,29)(26,32) involution — undirected(1,3,4,8)(2,6,5,7)(17,20,22,23)(18,26,24,28)(19,30,27,31)(21,29,32,25)(17,21,23,29,22,32,20,25)(18,27,28,31,24,19,26,30)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.