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