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)(21,22,25,29,26,30,23,27)(24,32,31,35,33,36,34,28)(1,2)(3,4)(5,7,9,8)(6,10,11,12)(13,15)(14,17)(16,19)(18,20)(21,23,26,25)(22,27,30,29)(24,31,33,34)(28,32,35,36)(5,8,9,7)(6,10,11,12)(15,19)(17,20)(2,4)(21,24,26,33)(22,28,30,35)(23,31,25,34)(27,32,29,36)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.