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