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