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