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