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