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)(13,15)(14,16)(17,18)(19,20)(21,24)(22,23)(25,26)(27,30)(28,32)(29,31)(1,3,4,8)(2,5,6,7)(9,11,13,16)(10,14,15,12)(17,18,21,24)(19,20,23,22)(25,27,29,32)(26,28,31,30)(2,6)(5,7)(11,16)(12,14)(19,23)(20,22)(25,27,29,32)(26,30,31,28)(1,3)(2,7)(4,8)(5,6)(9,11)(10,12)(13,16)(14,15)(17,19,21,23)(18,22,24,20)(25,27)(26,30)(28,31)(29,32)(1,2)(3,7)(4,6)(5,8)(9,12)(10,11)(13,14)(15,16)(17,20,21,22)(18,23,24,19)(25,28,29,30)(26,27,31,32)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.