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