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