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