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