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