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