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