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