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