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