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