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