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