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