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