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