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