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