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