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