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