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