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