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