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