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