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