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