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