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