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