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