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