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