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