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