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