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