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