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