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