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