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