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