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