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