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