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