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