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)(11,15)(12,13)(14,16)(17,18,23,21)(19,24,22,20)(25,26,29,28)(27,30,31,32)(1,3)(2,6)(4,7)(5,8)(10,13)(11,16)(17,19,23,22)(18,24,21,20)(27,31)(30,32)(2,7)(3,8)(9,10,12,13)(11,14,16,15)(17,20)(18,22)(19,21)(23,24)(25,27,29,31)(26,30,28,32)(1,2)(3,4)(5,7)(6,8)(9,10)(11,14)(12,13)(15,16)(17,21,23,18)(19,24,22,20)(1,4)(2,3)(5,6)(7,8)(9,11,12,16)(10,14,13,15)(17,22,23,19)(18,24,21,20)(25,28,29,26)(27,32,31,30)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.