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