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