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