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