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