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