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