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