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