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