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