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