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