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