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