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