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