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