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