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