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