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