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