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