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