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