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