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