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