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