One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,3,4)(5,6,8,13,11,15,21,10)(7,16,19,30,20,28,18,12)(9,23,22,24,26,14,32,31)(17,34,33,29,36,27,35,25)(6,10)(7,17)(8,21)(9,24)(12,27)(13,15)(14,32)(16,29)(18,33)(19,35)(20,36)(22,23)(25,28)(26,31)(30,34) involution — undirected(2,4)(5,7,8,18,11,20,21,19)(6,12,13,28,15,30,10,16)(9,25,22,27,26,29,32,34)(14,33,31,17,23,35,24,36)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.