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