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