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