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