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