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