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