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