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