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