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