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