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