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