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