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