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