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)(21,22,24,28,25,27,32,33)(23,26,30,35,29,34,31,36)(5,7,9,15,10,16,8,17)(6,11,12,14,13,20,18,19)(21,23,24,31,25,29,32,30)(22,26,33,35,27,34,28,36)(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)(23,29)(26,34)(30,31)(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.