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