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