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