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)(21,22,26,28)(23,31,32,24)(25,29,33,35)(27,30,34,36)(5,7,10,16)(6,11,13,14)(8,15,9,18)(12,19,17,20)(21,23,26,32)(22,24,28,31)(25,34,33,27)(29,30,35,36)(2,4)(21,24,27,29,26,31,34,35)(22,23,30,33,28,32,36,25)(5,8,10,9)(6,12,13,17)(7,15,16,18)(11,19,14,20)(22,28)(24,31)(29,35)(30,36)(5,9,10,8)(6,12,13,17)(7,15,16,18)(11,20,14,19)(21,25,34,32,26,33,27,23)(22,29,36,24,28,35,30,31)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.