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