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