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