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