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