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