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