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