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