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