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)(18,23)(19,28)(20,24)(21,30)(25,31)(29,32)(2,6)(7,8)(9,11)(10,13)(12,15)(14,16)(17,18,22,23)(19,29,31,20)(21,26,30,27)(24,25,32,28)(1,3,5,4)(2,7,6,8)(17,19,30,25,22,31,21,28)(18,24,26,20,23,32,27,29)(11,15)(13,16)(17,20,21,24,22,29,30,32)(18,25,27,19,23,28,26,31)(1,4,5,3)(2,7,6,8)(17,21,22,30)(18,26,23,27)(19,28,31,25)(20,32,29,24)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.