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