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