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