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