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