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