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)(17,18,23,21)(19,20,31,32)(22,26,28,27)(24,30,29,25)(2,6)(7,8)(9,11,13,10)(12,15,16,14)(17,19,28,30,23,31,22,25)(18,24,26,32,21,29,27,20)(1,3,5,4)(2,7,6,8)(10,11)(14,15)(17,20,28,24,23,32,22,29)(18,25,26,19,21,30,27,31)(1,4,5,3)(2,8,6,7)(12,16)(14,15)(17,21,23,18)(19,29,31,24)(20,25,32,30)(22,26,28,27)(9,12,13,16)(10,14,11,15)(17,22,23,28)(18,26,21,27)(19,30,31,25)(20,29,32,24)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.