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