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