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