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