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