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