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