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