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