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