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