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