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