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