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