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