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