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