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