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