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