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)(21,22,25,28)(23,26,29,33)(24,31,32,27)(30,36,35,34)(2,4)(23,29)(26,33)(30,35)(34,36) involution — undirected(5,7)(6,10)(8,15)(9,14)(11,13)(12,17)(16,20)(18,19)(21,23)(22,26)(24,30)(25,29)(27,34)(28,33)(31,36)(32,35) involution — undirected(6,11)(7,14)(12,18)(15,20)(23,29)(26,33)(30,35)(34,36) involution — undirected(6,11)(10,13)(12,18)(17,19)(21,24,25,32)(22,27,28,31)(23,30,29,35)(26,34,33,36)(5,8,9,16)(6,12,11,18)(7,15,14,20)(10,17,13,19)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.