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