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