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