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