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