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