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