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