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