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