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