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