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