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