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