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