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