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