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