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