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