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