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