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