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