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