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