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