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