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