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