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