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