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