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