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