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