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