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