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