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