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