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