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