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