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