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