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