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