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