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