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