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)(11,15,16,13)(17,18)(19,27)(20,23)(21,24)(22,26)(25,30)(28,29)(31,32)(2,5)(6,8)(9,11)(10,13)(12,16)(14,15)(17,19,23,30)(18,25,20,27)(21,28,26,32)(22,29,24,31)(10,14)(11,16)(17,20,22,26,23,18,24,21)(19,28,31,25,30,32,29,27)(1,3,4,7)(2,6,5,8)(10,14)(13,15)(17,21,22,20,23,26,24,18)(19,27,31,28,30,25,29,32)(2,5)(6,8)(10,14)(13,15)(17,22,23,24)(18,21,20,26)(19,29,30,31)(25,28,27,32)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.