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