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