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