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