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