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