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