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