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