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