One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,6)(3,7,8,5)(9,10,13,16)(11,14,12,15)(18,23)(19,26)(20,22)(24,31)(27,32)(28,30)(1,3,4,8)(2,5,6,7)(11,12)(14,15)(17,18,21,23)(19,27,28,24)(20,29,22,25)(26,31,30,32)(3,8)(5,7)(9,11,13,12)(10,14,16,15)(17,19,21,28)(18,24,23,27)(20,26,22,30)(25,31,29,32)(2,6)(5,7)(17,20,21,22)(18,25,23,29)(19,26,28,30)(24,31,27,32)(9,12,13,11)(10,15,16,14)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.