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