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