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