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