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