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