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