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