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