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