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