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