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