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