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