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