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