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