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