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