One vertex per element, one color per generator, with an edge from x to x·s.
(5,6,11,13,10,7,9,14)(8,12,18,19,17,15,16,20)(21,22,27,31)(23,28,26,36)(24,34,25,35)(29,33,30,32)(1,2)(3,4)(5,7,10,6)(8,15,17,12)(9,14,11,13)(16,20,18,19)(21,23,27,26)(22,28,31,36)(24,32,25,33)(29,35,30,34)(2,4)(5,8,10,17)(6,12,7,15)(9,16,11,18)(13,19,14,20)(21,24,27,25)(22,29,31,30)(23,32,26,33)(28,35,36,34)(6,13)(7,14)(9,11)(12,19)(15,20)(16,18)(21,25,27,24)(22,30,31,29)(23,33,26,32)(28,34,36,35)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.