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