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