One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(17,18,22,24,23,26,20,25)(19,27,28,31,29,30,32,21)(9,10,13,16)(11,15,12,14)(17,19)(18,21)(20,28)(22,32)(23,29)(24,30)(25,27)(26,31)(2,5)(6,8)(9,11,13,12)(10,14,16,15)(17,20,23,22)(18,24,26,25)(19,28,29,32)(21,30,31,27)(9,12,13,11)(10,15,16,14)(17,21)(18,19)(20,30)(22,27)(23,31)(24,28)(25,32)(26,29)(1,3,4,7)(2,6,5,8)(17,20,23,22)(18,25,26,24)(19,28,29,32)(21,27,31,30)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.