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