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