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