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