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