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