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