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