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