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