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