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