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