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