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)(11,13,15,16)(17,18,23,28)(19,29,31,24)(20,27,22,25)(21,26,30,32)(1,3,4,7)(2,5,6,8)(9,11,12,15)(10,13,14,16)(17,18)(19,29)(20,25)(21,32)(22,27)(23,28)(24,31)(26,30)(1,2)(3,5)(4,6)(7,8)(10,14)(11,15)(17,19,23,31)(18,24,28,29)(20,30,22,21)(25,32,27,26)(9,11,12,15)(10,13,14,16)(17,20,23,22)(18,25,28,27)(19,30,31,21)(24,32,29,26)(1,3)(2,5)(4,7)(6,8)(9,11)(10,13)(12,15)(14,16)(17,21)(18,26)(19,20)(22,31)(23,30)(24,25)(27,29)(28,32) involution — undirected(1,2)(3,5)(4,6)(7,8)(9,10)(11,13)(12,14)(15,16)(17,22,23,20)(18,27,28,25)(19,21,31,30)(24,26,29,32)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.