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