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