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