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)(11,14)(12,15)(13,16)(17,18)(19,26)(20,24)(21,30)(22,25)(23,28)(27,31)(29,32)(2,5)(6,8)(11,12)(14,15)(17,18)(19,23)(20,30)(21,24)(22,25)(26,28)(27,32)(29,31) involution — undirected(9,11,13,12)(10,14,16,15)(17,19,22,29)(18,23,25,31)(20,28,21,27)(24,32,30,26)(9,12,13,11)(10,15,16,14)(1,3,4,7)(2,6,5,8)(10,16)(14,15)(17,20,22,21)(18,24,25,30)(19,27,29,28)(23,26,31,32)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.