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