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