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