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