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