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