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)(11,16)(12,14)(13,15)(18,22)(19,20)(25,26)(27,32)(28,29)(30,31) involution — undirected(1,2,4,6)(3,5,7,8)(9,11,14,13)(10,15,12,16)(17,18)(19,24)(20,23)(21,22)(25,26,30,31)(27,32,28,29)(3,7)(5,8)(11,13)(15,16)(17,19,21,20)(18,23,22,24)(25,27,30,28)(26,29,31,32)(1,2)(3,5)(4,6)(7,8)(9,12,14,10)(11,15,13,16)(17,20,21,19)(18,23,22,24)(25,28,30,27)(26,29,31,32)(1,3,4,7)(2,5,6,8)(9,13,14,11)(10,15,12,16)(17,18)(19,24)(20,23)(21,22)(25,29)(26,27)(28,31)(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.