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