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