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