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