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