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