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