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