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