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