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)(17,18,22,24)(19,21,20,23)(25,26,29,32)(27,30,28,31)(2,3)(4,8)(10,13)(14,15)(17,19)(18,23)(20,22)(21,24) involution — undirected(2,3)(6,7)(11,16)(14,15)(18,24)(19,20)(25,27,29,28)(26,30,32,31)(1,3,5,2)(4,7,8,6)(9,11,12,16)(10,14,13,15)(17,20,22,19)(18,21,24,23)(25,26)(27,30)(28,31)(29,32)(1,4,5,8)(2,6,3,7)(9,10)(11,14)(12,13)(15,16)(17,21)(18,19)(20,24)(22,23)(25,28,29,27)(26,31,32,30)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.