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