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