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