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