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