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