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