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