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