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