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