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