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