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