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