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