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