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