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