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