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