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