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