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