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