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