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