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