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