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