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