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)(21,22,25,24,26,29,35,27)(23,30,33,31,32,28,36,34)(7,13)(8,16)(10,17)(11,15)(22,27)(24,29)(25,35)(28,31)(30,34)(33,36) involution — undirected(1,2,3,4)(5,7,9,13)(6,10,12,17)(8,14,16,19)(11,18,15,20)(21,23,26,32)(22,28,29,30)(24,34,27,31)(25,33,35,36)(7,13)(10,17)(14,19)(18,20)(21,24,35,22,26,27,25,29)(23,31,36,30,32,34,33,28)(5,8,9,16)(6,11,12,15)(7,14,13,19)(10,18,17,20)(23,32)(28,30)(31,34)(33,36)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.