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