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