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