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