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