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