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