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