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