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