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