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