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