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