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