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