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