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