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