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