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)(21,22,27,32)(23,30,34,36)(24,28,33,35)(25,29,26,31)(6,9)(10,12)(13,15,17,16)(14,18,20,19)(21,23,25,24,27,34,26,33)(22,28,31,30,32,35,29,36)(1,2,4,3)(6,9)(7,11)(13,15,17,16)(14,19,20,18)(22,29)(23,33)(24,34)(25,26)(28,35)(31,32)(1,3,4,2)(5,7,8,11)(6,10,9,12)(13,16,17,15)(14,19,20,18)(21,24,25,34,27,33,26,23)(22,30,31,35,32,36,29,28)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.