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