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