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