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