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