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