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