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