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