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