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