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