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