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