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