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