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