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