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