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