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