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