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