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