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