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