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