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