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