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