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