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