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