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