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