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