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