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