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)(11,15)(12,16)(13,14)(17,18,21,22)(19,20,24,23)(26,30)(27,32)(2,4)(6,7)(10,13)(15,16)(18,22)(20,23)(25,26,29,30)(27,31,32,28)(9,11,14,12)(10,15,13,16)(17,18,21,22)(19,23,24,20)(25,27,29,32)(26,31,30,28)(1,3,5,8)(2,6,4,7)(9,12,14,11)(10,16,13,15)(17,19)(18,23)(20,22)(21,24)(25,26)(27,31)(28,32)(29,30)(1,4,5,2)(3,7,8,6)(9,13,14,10)(11,16,12,15)(17,20,21,23)(18,19,22,24)(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.