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)(12,15)(13,14)(17,18)(19,24)(20,21)(22,23)(25,26)(27,32)(28,29)(30,31) involution — undirected(2,6)(4,8)(9,11,14,12)(10,15,13,16)(17,19,22,20)(18,21,23,24)(26,31)(27,29)(2,6)(3,7)(11,12)(15,16)(18,23)(19,20)(25,27,30,29)(26,32,31,28)(1,3,5,7)(2,4,6,8)(9,12,14,11)(10,15,13,16)(17,20,22,19)(18,21,23,24)(25,28,30,32)(26,27,31,29)(1,4)(2,7)(3,6)(5,8)(9,13,14,10)(11,15,12,16)(17,21)(18,19)(20,23)(22,24)(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.