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