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