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