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