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