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