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