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