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