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