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