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)(23,27,31,24)(25,33,36,28)(30,32,34,35)(13,14)(15,17)(16,18)(19,20)(21,23,26,31)(22,24,29,27)(25,30,36,34)(28,32,33,35)(5,6,8,9)(7,10,11,12)(13,14,16,18)(15,17,20,19)(21,23)(22,27)(24,29)(25,34)(26,31)(28,32)(30,36)(33,35)(1,2)(3,4)(5,6)(7,10)(8,9)(11,12)(13,14)(15,17)(16,18)(19,20)(21,24,26,27)(22,23,29,31)(25,35,36,32)(28,34,33,30)(5,7,8,11)(6,10,9,12)(13,15,16,20)(14,17,18,19)(21,25)(22,28)(23,30)(24,32)(26,36)(27,35)(29,33)(31,34)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.