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