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