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