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