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