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