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