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