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