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