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