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)(17,18,24,27,23,28,21,31)(19,26,29,32,20,25,30,22)(2,5)(3,7)(17,19)(18,25)(20,23)(21,30)(22,27)(24,29)(26,28)(31,32) involution — undirected(9,11,13,12)(10,14,15,16)(17,20,23,19)(18,26,28,25)(21,29,24,30)(22,27,32,31)(1,3,4,7)(2,6,5,8)(17,21,23,24)(18,27,28,31)(19,29,20,30)(22,25,32,26)(2,5)(6,8)(9,12,13,11)(10,14,15,16)(17,22,21,25,23,32,24,26)(18,20,31,29,28,19,27,30)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.