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