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