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)(17,18,21,26,22,24,20,25)(19,27,30,32,28,31,29,23)(9,10,13,14)(11,16,12,15)(17,19,22,28)(18,23,24,32)(20,30,21,29)(25,27,26,31)(2,5)(6,8)(9,11,13,12)(10,15,14,16)(18,24)(19,28)(25,26)(29,30)(9,12,13,11)(10,16,14,15)(17,20,22,21)(18,25,24,26)(19,29,28,30)(23,31,32,27)(1,3,4,7)(2,6,5,8)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.