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