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