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