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