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