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