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