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