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)(17,18,21,24)(19,20,23,22)(26,27)(28,32)(1,3)(2,4)(5,8)(6,7)(11,16)(13,15)(19,23)(20,22)(25,26,29,27)(28,30,32,31)(2,5)(3,7)(9,11)(10,13)(12,16)(14,15)(17,19,21,23)(18,22,24,20)(25,27,29,26)(28,30,32,31)(1,4,6,8)(2,7,5,3)(9,11)(10,13)(12,16)(14,15)(17,20,21,22)(18,23,24,19)(1,5,6,2)(3,8,7,4)(9,10)(11,13)(12,14)(15,16)(17,18)(19,22)(20,23)(21,24)(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.