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