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