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