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