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