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)(17,18,24,21)(19,29,31,26)(20,32,30,25)(22,28,23,27)(2,5)(6,8)(9,10)(11,16)(12,15)(13,14)(17,19,24,31)(18,25,21,32)(20,23,30,22)(26,28,29,27)(10,14)(15,16)(17,20,24,30)(18,26,21,29)(19,22,31,23)(25,27,32,28)(9,11,13,12)(10,15,14,16)(17,21,24,18)(19,25,31,32)(20,26,30,29)(22,28,23,27)(1,3,4,7)(2,6,5,8)(9,12,13,11)(10,15,14,16)(18,21)(25,32)(26,29)(27,28)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.