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)(11,16)(12,14)(13,15)(20,28)(25,30)(27,29)(31,32)(1,3,5,8)(2,6,4,7)(9,11,13,12)(10,14,15,16)(17,18,23,22)(19,26,21,24)(20,25,28,30)(27,32,29,31)(10,15)(14,16)(17,19,23,21)(18,24,22,26)(20,27,28,29)(25,31,30,32)(9,10)(11,14)(12,16)(13,15)(17,20,23,28)(18,25,22,30)(19,27,21,29)(24,31,26,32)(1,2,5,4)(3,6,8,7)(9,12,13,11)(10,16,15,14)(17,21,23,19)(18,24,22,26)(20,29,28,27)(25,31,30,32)(1,4,5,2)(3,7,8,6)(17,22,23,18)(19,26,21,24)(20,30,28,25)(27,32,29,31)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.