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