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