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