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