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