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