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