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