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