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