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