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