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)(19,28)(20,25)(21,26)(22,31)(23,27)(24,29)(30,32)(1,2)(3,4)(17,19,22,29,23,21,20,30)(18,24,25,28,27,32,31,26)(2,4)(10,13)(14,16)(17,20,23,22)(18,25,27,31)(19,29,21,30)(24,26,32,28)(6,8)(9,11,12,15)(10,14,13,16)(17,21,23,19)(18,26,27,28)(20,30,22,29)(24,25,32,31)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.