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