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