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