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