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