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