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)(13,14,17,16)(15,18,19,20)(21,22)(23,27)(24,26)(25,28)(29,34)(30,31)(32,33)(35,36)(7,8)(10,11)(15,19)(18,20)(22,24)(27,31)(28,32)(34,35) involution — undirected(5,7,9,8)(6,10,12,11)(13,15)(14,18)(16,20)(17,19)(21,23)(22,27)(24,31)(25,29)(26,30)(28,34)(32,35)(33,36)(1,2)(3,4)(5,8,9,7)(6,11,12,10)(13,16,17,14)(15,20,19,18)(21,24,26,22)(23,27,30,31)(25,28,33,32)(29,35,36,34)(5,6)(7,10)(8,11)(9,12)(21,25,26,33)(22,28,24,32)(23,29,30,36)(27,34,31,35)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.