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