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