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