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