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