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