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