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