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