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