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