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