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