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