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