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