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