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