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