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