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