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