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