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