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