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