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