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